Mixing scale



B. WILSON MIXING SCALE April 1, 1952 2 SHEETS-SHEET 2 Filed Oct. 28, 1948 Berf Wilson Gnome/ b v Patented Apr. 1, 1 952 MIXING SCALE I Bert Wilson, Dallas, Tex., assignor to Andrew Brown Company, Los Angeles, Calif., a corpo-' ration of California Application October 28, 1948, Serial No. 56,981

This invention relates to new and useful improvements in mixing scales.

One object of the invention is to provide an improved scale for mixing packaged commodities such as mixed paint wherein changeable charts and weights are provided for each particular mixture and quantity, thus not only assuring proper weight but correct proportioning of the ingredients by weight.

Another object of the invention is to provide an improved mixing scale wherein changeable charts and weights are employed, given weights co-actingwith particular charts to provide the desired quantities of various mixtures.

Yet another object of the invention is to provide an improved mixing scale wherein a given quantity of a certain mixture may be compounded in a container of any size or weight.

A construction designed to carry out the invention will be hereinafter described together with other features of the invention.

The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings, wherein an example of the invention is shown, and wherein:

Fig. 1 is a front elevation of a scale constructed in accordance with the invention.

Fig. 2 is a plan View of the mechanism, the case and housing being omitted.

Fig. 3 is an isometrical view of the scale mechanism.

' Fig. 4 is an enlarged cross-sectional view of one of the shafts and its mountings.

Fig. 5 is an enlarged vertical sectional view of the dash pot, and

Fig. 6 is a vertical sectional view of the upper end of the housing showing the chart holder.

In the drawings, the numeral l designates a base frame having risers or posts II. For convenience the frame will be described as having a front side (Figs. 2 and 3), a rear side and ends. The risers are made integral with the frame at the right hand end (Figs. 2 and 3) and at the front and rear thereof. A lower balance shaft l2 extends between the risers just above frame.

, An upper balance shaft It extends between the upper ends of the riser and has one end of a link l mounted thereon, while its opposite 4 Claims. (01'. 265-451) ends journaled in the legs of the bridle.

2 M an H shaped bridle or swing l8. A lower rock shaft I9 passing through the beam I3 has its A circular platform 2| is fastened on the upper ends of the uprights ll. When the opposite end of the beam'is movably suspended, it is obvious that a load placed on the platform 2| will depress the latter through the agency of the bridle [8. The shafts I2, l4, l6 and I9 have their ends reduced and'supported in spindle mountings 22 of the ball-bearing type, which are common in this art and are not described in detail. Each shaft has a reduced, screw-threaded shank 23 extending substantially to the center of the shaft and terminating at a shoulder 24. The reduced shank 23 passes through the beam or link so endis mounted on an upper rock shaft l6 havj ing its ends journaled in the uprights ll of that the shoulder contacts one side thereof and a nut 25 is adjacent the opposite side of said beam or link so as to confine the latter.

Nearer the left hand end of the frame, a post 26 rises from the rear side (Figs. 2 and 3). A rock shaft 21 has its rear end journaled in one of the spindle mountings 22 and its forward end journaled in a similar mounting in the overhanging end of a right angular standard 23 rising from the front side (Figs. 2 and 3) of said frame. This shaft also has a reduced, screw-threaded shank 23 and a shoulder 24. A flat faced wheel 29 is secured on the shank 23 of the shaft 21, tight against the shoulder 24 by a nut 30.

For suspending the end of the beam I3, a flexible ribbon or tape 3| is employed. This tape has its upper end secured on the face of the wheel 29 by a fastening 32 and carries a bracket 33 which is fastened on the adjacent end of the beam. It is obvious that when the beam is swung downwardly the tape will be unwound from the wheel'and the latter revolved in a clockwise direction. Counter means for revolving the wheel in a counter-clockwise direction and thus swinging the adjacent end of the beam upwardly, includes a load arm 34 having its upper end screwed onto the shank of the shaft 21 and fastened by a jamb nut 35. An outwardly or forwardly extending pin 36 is carried by the outer end of the arm.

An indicator rod 31 passes through the shaft 21' in the rear of the wheel 29. For dampening or steadying the swinging of the beam'and the elements co-acting therewith, a dash pot 38 is mounted on the base frame adjacent the tape 3| and has'a plunger 39 therein. The plunger which is immersed in a viscous liquid, such as oil; has a loose sliding fit in the pot and is connected to the overhanging end of an inverted U-sh'aped hanger 4p secured onthe beam.

A rectangular case 41 has an open bottom and receives the scale mechanism which has been described, the swing l8 passing through a slot I8 in the top of said case. The frame I!) is suitably secured in the bottom of said case and the pin 36 projects through an arcuate slot 36' in the front of the case. The indicator rod 31 extends up into a fan-shaped housing 42 mounted on one end of-the case. The housing has a rectangular window 43 at its upper end and the upper end of the rod is exposed through this window.

The beam [3 extends through a slot 44 at the right hand side (Fig. l) and receives a counterweight 45 which is slidable on the beam and removable therefrom. A load weight 46 is removably mounted on the end of the pin which projects from the front of the case. The weights and 46 and the elements are so arranged and calibrated that when an'empty can of predetermined size and weight is resting on the platform 2|, the load arm 34 will be in a substantially vertical, depending position and adjacent an angular stop 41 mounted on the base I0. This will bring the rod 3! to a position wherein its index finger 48 will register with the zero or first graduation A of a chart 49 displayed through the window 43. I It is pointed out that it is necessary to select a can of predetermined size, as for instance 2 I quarts or gallon, and when this is done the weight 45 must be properly adjusted and the proper weight 45 selected and placed on the pin .36. Thisweight 45 will be marked 2 quarts. When the weight 43 is placed on the pin, the

arm 34 may be swung down until it engages the stop 41, because owing to the flexible band 3|, the inner end of the beam 13 is free to swing upward thus causing slack in said band and this would occur if the weight 45 was placed too far outwardly on the beam l3. With the proper can on the platform 2|, the weight 45 is adjusted to its counterbalancing position and to take all slack. out of the band. This may move the arm 34 index finger will be moved over the chart 49.

The chart 49 comprises a sheet of heavy paper printed with suitable graduation marks arranged in an arc. Each chart is calibrated in accordance with the quantities or proportions of materials required to produce a desired mixture. Where the scale is used for mixing paint, a chart show- .ingthe mixture for a particular color is selected.

The window 43 has a frame 50 along its top and ends and the rear wall of the housing 42 is extended to form a back 5!, thus leaving the top of the housing open so as to permit a free swing of the rod 31. The top of the frame 50 is also .open so that the chart may be lowered therethrough. Lugs 52 bent from the ends of the frame against the wall 5| form supports for the chart.

A specimen chart 49 is illustrated in Fig. 1.

This chart is printed with graduation marks A,

B, C, D and E, the mark Abeing the zerom'ark hereinbefore referred to. These marks are'ar- 4 ranged in an arc in the path of the swing of the finger 48. The marks A and B are close together and indicate the quantity of drier required for the particular mixture. The drier is poured into the can until the finger moves from A to B. The stock numbers of the other ingredients are printed between the other marks. The operator pours ingredient 30I into the can until the finger moves from B to C, ingredient 3 I 2 until said pointer moves from C to D, ingredient 318 as the finger moves from D to E, and ingredient 328 until the finger moves from E to F. This will maybe more rapidly filled and the desired color,

shade or consistency will be assured. It is pointed out. that when the platform 2| is empty and various weights 46 are placed in the pin 36, the

load arm 34 will be swung to a perpendicular position against the stop 41 and whether this weight is for 1 pint or 1 gallon, said arm will always be moved to a perpendicular position. However when the empty can (not shown) is placed on the platform 2|, the counterbalancing weight 45 is necessary to bring the finger 48 to the zero mark.

A plurality of the load weights 49 of various sizes are provided and may be hung upon the pin 36 to vary the sensitivity or sensibility of the scale and permit the compounding of different quantities of a given mixture. Thus, a pint, a quart, five gallons, or any desired amount of a mixture may be had by placing the appropriate weight for that quantity upon the pin 36. Since the weight must be lifted by the load placed in the can being used, it is manifest that as the mass of the weight'varies, the load necessary to swing the arm 34 a given amount also varies. chart 49 therefore is a proportional chart and may be used for obtaining any desired quantities of a given mixture. The deflection of the finger 48 from, say, point E, is the same whether a pint or a gallon of mixture is being prepared. However, because of the difference in the mass of the weights placed upon the pin 35, the load upon the platform 2| necessary to obtain this deflection will differ and will be proportional as a pint is proportional to a gallon. Of course, the masses of the various weights 49 are such that each weight will permit full deflection of the finger 48 when the adding of the proper quantities of ingredients has been completed, and each weight is carefully made with the mass necessary for mixture of a certain quantity or volumes upon the several weights.

With this structure, an operator may keep on hand in bulk a number of ingredients necessary to compound desired mixtures, such .as enamels, paints and lacquers of various colors and shades. In very short order, he may mix a great variety of the desired compounds from certain of the ingredients kept in'bulk, and may so mix the com- .pounds in any desired quantity. He is therefore relieved of the burden of keeping on hand stocks of all of the desired compounds in containers of all of the many sizes or quantities which may be needed. Instead, he may keep a relatively small number of ingredients in bulk and readily compound the desired amount of a certain mixture therefrom.

The

It is also to be pointed out that it is not necessary that the can or container used have a capacity equal to the amount of mixture being compounded, or that containers of a given size be of uniform weight. The counterweight 45 may be adjusted to any point along the exposed portion of the beam 13 to counterbalance the container being employed. However, once the scale is so balanced, the position of the weight 45 has no eifect upon the sensibility of the scale, this being controlled solely by the mass of the load weight 49' placed upon the pin 36.

The foregoing description of the invention is explanatory thereof and various changes in the size, shape and materials, as well as in the details of the illustrated construction may be made, without the scope of the appended claims, without departing from the spirit of the invention.

I claim:

1. A mixing scale including, a base frame, risers at one end of said frame, upright supports at the opposite end of said frame, a beam pivoted intermediate its ends between the risers, a swing pivoted to the risers and the beam adjacent said risers and between the risers and the supports, a platform on the swing, an adjustable counterweight on the beam on the opposite side of the risers from the swing, a rock shaft journaled between the supports, a wheel on the rock shaft, a flexible connection between the wheel and the beam, a load arm depending from the rock shaft, an indicator rod extending upwardly from the rock shaft, an enclosure receiving the frame and the elements thereon having a slot at one end through which the beam extends and an arcuate slot in its front, a pin on the arm extendin through the arcuate slot of the case, and a load weight removably mounted on the pin exteriorly of said case, the case having an upright extension through which the rod extends, said case extension having a visible chart across which the upper end of the rod swings.

2. In a mixing scale, the combination of a base having an upright housing thereon, a chart visible at the top of the housing having a mixing scale thereon, a beam pivoted in the case and having one end projecting from said case, the case having an arcuate slot in its front side, a rotatable member in the case, having a forwardly directed pin movable in the arcuate slot of the case, a stop on the base in the path of the arm. a removable load weight mounted on said pin exteriorly of the case, whereby the arm is swung down into engagement with the stop, a platform above the case having pivoted connection with 6 the beam, and an indicator rod carried by the rotatable member extending up through the housing and having its upper end opposite the first indication of the scale of said chart when the arm is in engagement with the stop.

3. In a mixing scale, the combination of an elongate scale beam pivotally mounted adjacent to its outer end and having a movable counterbalancing weight thereon outwardly beyond its pivot, a support, a removable chart mounted on the support and having a scale thereon provided with gr-aduations calibrated in predetermined proportions of a mixture of materials of a given total weight, a platform pivotally connected to the beam inwardl of the pivot of said beam and adapted to receive an empty container of predetermined size, a rotatable member having an in' dicator movable across said scale and adapted to initially register with the indication at one end of the scale, an arm extending from the rotatable member, a stop in the path of said arm, a changeable weight proportioned to the load of the mixture to be placed in the container removably mounted on said arm, whereby said arm is swung down into contact with said stop and the indicator is positioned in registration with the initial indication of said scale, and a rotating device mounted on the rotatable member having a flexible connection adapted to be wound on said member and having an end attached to the inner end of said beam.

4. A. mixing scale as set forth in claim 3, with a housing enclosing the major length of the beam, the chart and the rotatable member and the arm having openings through which the outer end of the beam and the arm support for he changeable weight andthe platform connection extend.

BERT WILSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,022,376 Nilson Apr. 2, 1912 1,193,711 Nilson Aug. 8, 1916 1,253,318 Wetzel Jan. 15, 1913 1,522,037 Spotz Jan. 6, 1925 2,118,727 Hanes May 24, 1938 FOREIGN PATENTS Number Country Date 504,335 Great Britain Apr. 24, 1939 

